The Gram-negative rod of the genus SALMONELLA has one species called ENTERICA, 6 subspecies and over 2000 serotypes, some of which are host-adapted. Signs range from acute to chronic; shedders can carry the organism without signs. Clinical Salmonellosis is most common in calves but can occur at any age. Septicemia, especially in young calves, causes sloughing of the skin of the extremities in rare cases and meningitis is sometimes part of the disease syndrome. Abortion can follow fetal infection. This is a zoonosis.